Entity E uses a perpetual inventory system. On September 1, Entity E (buyer) purchased merchandise from Entity F for $70,000, terms 2/10, net 30. Unknown to Entity E, the merchandise cost Entity F $50,000. Entity E's entry to record this transaction is: O Dr. Accounts receivable 70,000 Cr. Sales 70,000 Dr. Accounts Receivable 70,000 Cr. Sales 70,000 Dr. Cost of goods sold 50,000 Cr. Inventory 50,000 O Dr. Inventory 70,000 Cr. Accounts Payable 70,000 O None of the above